41032 - 3-pane: pull splitter up over thread pane should hide columns

Status: NEW

(SeaMonkey :: MailNews: Message Display, enhancement, P3)

Description

[laurel]

Using may30 commercial build on linux rh6.0, Mac OS 9.0, NT 4.0

found (by jrgm) when verifying bug #23060

When in the 3-pane mail window and you drag the thread/message pane splitter
upward over the entire thread pane when a message is displayed, the thread pane
column headers are still visible through the splitter line.  This not only makes
for sloppy display, but it also can interfere with the usage of the gripper on
the splitter.

Steps to reproduce:
1.  Go to 3-pane mail window (test with both window layout options from main
mailnews prefs panel).  Message pane is shown.
2.  Select a message and let it fully display. (problem doesn't happen when
there is no message selected/displayed).
3.  Grab the grippy on the thread/message pane splitter. Drag it all the way
upward to cover the entire thread pane.

Result:  The display of the thread pane column headers displays through the
splitter bar.  Many times this will interfere with the ability to grab the
grippy to drag it downward again.  In that case, clicking on the grippy will
snap the splitter just enough to grab it and drag it again.

Expected result:  dragging the splitter upward over the entire thread pane
should hide the thread pane column headings.

Comment 1

[scottputterman]

reassigning to evaughan.  My guess is this is similar to all of the other
splitter bugs we've been seeing about widgets showing through.

Comment 2

[scottputterman]

bugzilla is messing up the summary.  putting the old one back.

Comment 3

[John Morrison]

Attachment: testcase; simplified from mail 3pane [text/xul]

Comment 4

[Ninoschka Baca]

Build 2000-06-23-08M17: NT4, Linux 6.0, Mac 9.04
Move the splitter upwards so the message pane is maximized and it stops right 
before the column headers (i.e. Thread, Subject, Sender). The thread pane 
doesn't appear to be displaying through the splitter bar anymore.

I do agree that the splitter should have the ability to hide the column headers. 

Comment 5

[Eric Vaughan]

Ok the splitter will go over the header if someone makes the top tree's 
min-height=1. But thats up to the mail news guys if they want it to look like 
that.

Comment 6

[scottputterman]

moving to future milestone.  The original problem is gone but you can't pull
over the columns.

Comment 7

[Stefan Sofariu]

Attachment: the horizontal splitter messes the upper tree

it's a very old bug now.
a easy soultion is to set for the upper treeview a value for the minimal height
of two lines.

Comment 8

[Wayne Mery (:wsmwk)]

wontfix, given current behavior?  ... which is, 

a) that thread pane has a minimum size and can't be put immediately below headers
b) "removing" thread pane doesn't exist, unlike (F8 and F9) removing folder and message preview
c) under what circumstances/use case does it make sense to be able to hide the thread pane?  (I can't think of one)